Engraving apparatus



Jan. 4, 1927. 1,612,967

R. T. DIEGE S ENGRAV'ING APPARATUS Filed Jan. '7. 1924 Fig.1.

Fig.2.

Fig.3.

Fig. 1

Fig. 5

IN VENTOR Rober'fI Dieqes I ATTORNEY Patented Jan. 4, 1927.

UNITED STATES tense? PATENT orricsx.

ROBERT T. DIEGES, 01'" NEW' YORK, N. 1., ASSZGNOR T0 DEFOEEST RADIOTELEPHONE n" Lilli JERSEY, A. OURPGRATIO'N OF DELAWARE:

ENGRAVIHG APEARATUS.

Application filed January 7, 1924. Serial No. 684,799.

This invention relates to engraving apparatus and more'particularly toapparatus 0 that class wherein the engraving is accomplished by means ofa punch or die.

The objects of the invention are to provide an apparatus which willaccomplish its purpose with facility and obtain acceptable results; toobtain a clean cut impression; to prevent the material becoming crackedor irregular adjacent the cut; to enable the engraving to be carried outwith. considerable rapidit to provide for exactly positioning theengraving die with respect to the article being engraved; to maintainthe dies in proper relative position and out of the way; to securesimplicity of construction and operation, and. to obtain otheradvantages and results as may be brought out in the following{description.

eferring to the accompanying drawing in which like numerals of referenceindicate similar parts throughout the several views;

Figure 1 is a plan of an engraving apparatus constructed in accordancewith my invention;

Figure 2 is an elevation of the same iron. the side which may be termedthe front;

Figure 3 is a transverse sectional view on line 3 3 of Figure 2 showinga panel to be engraved partially inserted;

Figure 4: is a similar sectional view showingrthe panel'in position andthe die depressed by means of a press; and

Figure 5 is a face view of a die as employed in connection with myinvention.

In the specific embodiment of the invention illustrated in said drawing,reference I numeral 1 indicates a die-carrier which is in the nature ofa plate and is supported in parallel and spaced relation to a'similarbase or bed plate 2. As shown in the drawing, I provide supports 3 atthe ends of the said die-carrier and base for rigidly maintaining thesame in position relative to each other. It is to be noted that thedie-carrier and bed plate are space-cl far enough apart to permit theconvenient insertion of the article which is to be engraved. The presentapparatus as shown is intended for engraving the various characters andwording upon the panels used in connection with radio apparatus. InFigures 3 and l 1 have shown such a panel 4 in connection with theapparatus the panel only being partially inserted in Figure 3. Theapparatus is preferably f made of proper size to accommodate theparticular size panel. which it is intended to engrave that is, thedistance between the side or upright supports 3, 3 is preferably equalto the length of the panel so when inserting the panel from the front itwill beheld by the said supports 3 from longitudinal move.- ment.Suitable stops 5 are provided near the rear edge of the bed plateagainst which the rear edge of the panel may engage when inserted in theapparatus. At.

the front of the bed plate I provide an ear 6 through which operates athumb screw 7 the inner end of which can be brought into engagement withthe front edge of the panel for pressing the panel against the stops 5and thus hold the panel in exact position while being operated upon. I

.Slidably mounted in the die-carrier l are a plurality of dies 8. Thesedies are positioned at the proper place for engraving the desired matterupon the panel, when the dies are depressed. In the present showing Ihave merely represented three dies in a row but it is to be understoodthat the number and position of the dies may be varied to suit the needsof any particular panel without departing from the invention. Each dieis preferably movable toward and away from the panel independently ofthe other dies, so that any die may beoperated without operating therest, if so desired.

As shown in the drawings the dies preferably include a shank 9 and anenlarged head 10 the end of which constitutes the die surface and isflat except for the particular wording or device which is to be engravedin the panel. Such wording or device, as indicated by reference numeral11, protrudes from the flat surface 12 of the die only a distance equalto the depth which it is desired to impress in the panel. As a result ofthis construction when the die is forced downward upon the panel therequisite impression is made in the panel and then the fiat surface 12of the die engages the panel, not only preventing further depression ofthe die but preventing the panel from being burred,

roughened or cracked adjacent the imprestelligible or of such a naturethat the impression could not be filled with white lead or othersubstance, as is usual in the art.

It is to be understood that the head of the die is positioned beneaththe die-carrier 1 facing toward the bed plate 2 with its shank 9extending upwardly through a suitable hole in the die-carrier withinwhich said shank is vertically slidable. The shank 9 is provided with avertical keyway 13 and a projection or key 14 is provided in the holethrough the die-carrier so as to prevent rotation of the die, but permitslidable movement thereof. A collar 14 is secured, as by screws 15, tothe top of the shank and a spring 16 surrounds the shank beneath thecollar for maintaining the die normally in an upward position. It is tobe understood that in the use of my apparatus that the dies may bedepressed separately or in groups or all together and if they aredepressed in groups that overlap, it to be noted. that no harm is doneby depressing the one die twice because of the large flat surface of thedie which will not permit the cutting portion of the die to go furtherthe second time than it went the first time. Likewise, depressing a dietwice will not cause the cut to be made in a different place because thepanel is held fixed relative to the path of movement of the die at alltimes. I have shown diagrammatically a press hammer 17 in Figure i,forcing a single die downwardly against the panel.

In operation, a panel 4 to be engraved is inserted in place, thumb screw7 is tightened so as to hold the panel exactly where placed, and thenthe dies are operated. Operation or depression of the dies causes thelettering or impression portion to engage and sink By way ofillustration into the panel, after which the flatportion 12 of the diecomes into engagement with the panel and flattens out any burrs,projections or irregularities on the face of the panel in and around thelettering or impression which resulted from the displacement ofmaterials caused by the impression portion. This flattening operation iscarried out by the die while the impression portion thereof is in thecut or impression of the panel so the impression remains clear and thematerial is compressed around the impression making it flat and smoothwithout any detrimental effect on the impression. It is fur-- ther to benotec that the peripheral edge of the flat portion or surface 12 of thedie is rounded off so that the edge will not cut into the material andshow a ridge on the panel. This rounding may be on either a small orlarge radius of curvature as found most desirable, although I have shownit with a relatively small one.

Obviously detail modifications and changes may be made in theconstruction and operation of my improved engraving apparatus, and I donot wish to be understood as limiting myself to the exact structureshown except as set forth in the following claim when construed in thelight of the prior art.

Having thus described my invention, 1 claim:

An engraving apparatus comprising a diecarrier and base maintained infixed relation to each other, a stop at one edge of the base,

and adjustable means at the other edge of the base for pressing thearticle to be en-- graved against the stop.

In witness whereof, I hereunto fix my hand and seal this 2nd day ofJanuary, 1923.

- ROBERT T. DIEGES.

